I have a TiVo series 3 which plays 5.1 surround just fine. I noticed that when I use kmttg and Streamclip to down load and remove commercials, I lose the 5.1 surround getting only stereo. kmttg downloads to my Mac Pro giving numerous files only 2 of which I use, .edl and .mpeg. I use Excel to read the .edl which contains in and out points for the commercials and Streamclip MPEG to actually use the in and out points to cut the commercials. That way I have more control on what is cut. Streamclip then saves the processed file as MPEG with final conversion by Handbreak to MP4. I lose the surround in the mpeg file kmttg creates. Am I missing some modifications of kmttg or Streamclip? Any help would be appreciated.